“Discovering a second galaxy with very little to no dark matter is just as exciting as the initial discovery of DF2,” Yale University’s Professor Pieter van Dokkum.
“This means the chances of finding more of these galaxies are now higher than we previously thought. Since we have no good ideas for how these galaxies were formed, I hope these discoveries will encourage more scientists to work on this puzzle.”
The newly-discovered galaxy, named NGC 1052-DF4 (DF4 for short), resembles DF2 in terms of its size, brightness, and morphology, and has a similar distance of 65 million light-years.
“Like DF2, it belongs to a recently-discovered class of galaxies called ultra-diffuse galaxies (UDGs),” the astronomers said.
“They are as large as the Milky Way but have between 100 to 1,000 times fewer stars, making them appear fluffy and translucent, therefore difficult to observe.”
“Ironically, the lack of dark matter in thes...